Journal of Transsib Railway Studies V.3(31), 2017

The experience of the railways electrification in Russia and the justification of the current type choice for the electrification of the Ulan-Bator Railway are considered. The calculation of the maximum mass of the wagons of freight trains of an AC electric locomotive of 2ES5K and an electric locomotive of direct current 2ES6 in the conditions of the Ulan Bator Railway is performed. The rationale for choosing the kind of current for the electrification of the Ulan Bator railway is presented.

In the article the paper considers mathematical modeling of fuel equipment of high pressure and regulator of the rotation frequency of the crankshaft of the diesel engine. Analysis of factors affecting fuel equipment, mathematical modelling of the process of fuel into the cylinders, as well as mathematically describes the speed control of the crankshaft of the diesel diesel engine. Joint mathematical model of fuel equipment and rotation speed regulator. Presented algorithm and program calculation process the fuel feed to the cylinders of a diesel engine with a light hydraulic characteristics of generalized elements of fuel equipment and provision of the Executive mechanism of the regulator of the rotation frequency of the crankshaft of the diesel engine. In the work used mathematical and simulation, system analysis methods, the comparative method, methods of theoretical knowledge (formalisation), common logical methods and techniques of research (analysis, synthesis, classification, analogy ).

The article summarizes and analyzes data on the use of natural gas (methane) as an additive to diesel fuel on the low-pressure line of diesel engines of locomotive CHME3.The results of The gas engine fuel effect assessment on the efficiency of locomotives CHME3 are presented.

The new dynamic effects, arising in problems of vibration protection of objects at external perturbations from the bearing surfaces, are considered.A method of constructing mathematical models for the vibration-protection system, in which protection of an object has two degrees of freedom, is developed. The possibilities of the introduction of additional ties in the form of devices for converting the movement are shown. The possibilities of using screw non self-locking mechanisms with nuts - flywheels, reduced moment of inertia may be regulated are estimated. The technique of constructing frequency chart, showing the possible forms of realization of the dynamic effects, is offered. The conditions of the realization of new physical effects in the form of simultaneous dynamic vibration damping of the solid at the same time by two coordinates at the kinematic system perturbation are determined. Results of numerical modeling are given.

Electricity consumption for traction depends on a number of operational parameters, including the use of power of electric rolling stock. On Russian Railways there are flat areas of great extent, which operated the locomotives inefficient use of power and work modes with low energy performance. The aim of this work is to examine ways to improve the energy efficiency of passenger locomotives, such as the operation of electric rolling stock with rational values of power and number of axes for the modern passenger transport on the flat sections of the road long-haul and assess their energy performance. To achieve this goal was determined by the rational value of the power required for driving trains on this stretch of track with maximum speeds of 160 km/h, the calculations of the asynchronous traction motors obtained traction and power characteristics of electric locomotives with asynchronous traction drive, and a proposed comparison methodology, allowing to evaluate the difference of power consumption for traction of electric locomotives with asynchronous traction drive (with rational values of power and number of axes) currently operating a DC electric locomotive EP2K. On the basis of the conducted research it was concluded that there are reserves for improvement of energy efficiency of passenger locomotives on the flat sections of the road long-haul, such as operation of electric rolling stock with rational values of power and number of axes corresponding to the train weight, speed and track profile, which will significantly reduce the cost of electricity for traction of trains.

In this article outlined some results of dynamic tests of the gondola with biaxial bogies ZK1 type. Done the comparative calculations for the study the influence of carriages to the main dynamic performances.

The article carried out a comparison of the magnitude of the crest of the pressure forces on the rail in the curve sections of track and locomotives TG16 TG16M.

A study of the influence of non-linear parameters spring of a freight car suspension (stiffness spring, length base of a bogie, roughnesses railway) on the amplitude and phase fluctuations bouncing body is completed. Defined own vibrational frequency jumps car body as a function of the parameters.

This article describes developed «Collector-brush heat» pc-application », which is aimed to automatically process thermal images, received during thermos-vision of DC machine collector-brush unit. This application allows to calculate the thermal rate and to build collector-brush heating curve. The application is developed in order to apply it in the traction drive diagnostics hardware-software complex.

The problems of optimization of organization of maintenance and repair of locomotives. The article presents new approaches for calculating the norms of spare parts and materials. Models of vehicle systems consisting of a fleet of operated locomotives are given, taking into account all conditions.

In article temporary characteristics and results of the analysis of operation of the relay - the differential shunt are considered at full removal of a package of steel on a branch of smaller section. Conclusions are drawn on opportunities of its application at pass by the electrorolling stock of the isolating interfaces. The method of the choice of settings of the relay - the differential shunt, considering time delay at its operation is offered.

In article methods of valuation electrical parameters and mathematical models of electic processes of reinforced concrete construction are considered. The conclusion that influence of reinforced mesh was not taken into account in describe models had been done. Method for prediction of reinforced concrete foundation which based on equation system of electric field in conductors and finite element method and allowed explicit geometry of object include reinforced mesh was suggested by authors. Authors done the assumption about invariability of potential of reinforced mesh which covered of concrete layer for direct current and alternating current due to ratio of steel and concrete resistance. Realization of nethod was done by dint of software complex Comsol Multiphysics. Research object was reinforced steel foundation TSS-4, which is located in ground. Result of research was represented color epure of potential distribution and line of current density. Reinforced concrete construction current and current which flow into armature were determined by dint of integration of normal current density on surface where set the external potential and surface of armature. On the grounds of determine values of model current resistance of model depending on resistivity of concrete and ground were calculated.

The article deals with the introduction of a twenty - four pulse rectifiers with various rectification circuits on direct current traction substations. The results of the operation of a twenty-four-pulse rectifier installed at one of the traction substations prove the expediency of using such a converter. The variants of the existing equipment modernization, which is a part of the six- and twelve-pulse rectifiers in order to use it in the creation of twenty-four-pulse rectifiers, as well as the requirements for the creation of such rectifiers in industrial design are given.

The article examines the technique of designing diagnostic system of infrastructure of electrical railways based on use of bayesian networks for prediction of probabilities of failures. To achieve maximum effectiveness of diagnosis we should minimize the number of input parameters, while maintaining the required accuracy. It is proposed to create a mathematical model of the diagnostic system, that will allow to evaluate the influence of each parameter on the accuracy of prediction of failures. To compensate the lack of source data we can use the advantage of bayesian networks - the opportunity to generate network structure by the method of expert evaluations. Generated bayesian network will perform the failure probability calculation with limited information.

The article presents the results of measurements of electricity on active and passive sectioning posts the traction power supply system direct current sections of railways with III and IV path profile type. Basic characteristics of operating modes sectioning posts for the purpose of assessing the amount of electricity transferred and duration of work electricity storage in different modes are considered. The most observed voltage values, volumes of transmitted energy and duration of each case are defined. Choice of theoretical distribution laws, allowing to use the experimental values obtained in further calculations in modeling of operating modes electricity storage is completed.

In this article the tasks of simulation of flows on the railways are discussed. The main purpose of this work is to create a new simulation technology such a complex system as the rail network. Scientific novelty consists in the application of a combination of agent-based and discrete-event approaches in a given subject area. During the conducted study the models of behavior of agents were created, the problematic situation was highlighted and discrete-event part of the model was developed for this situation. The main categories of regular and emergency situations are analyzed, a list of situations for modelling are created. Choices for removal emergency situations were discussed, an algorithm for their processing (discrete-event part of the model) was chosen. An illustration of the study is a simulation model of the railway section of the West-Siberian railway with the possibility of rebuilding the train schedule, which depend on the addition of regular or emergency situation. As a result of the simulation, output such as a traffic graph and an information table are generated. There are plans to use new technology for creating model of "transport hub”.